Two showy traits, scent emission and pigmentation, are finely coregulated by the MYB transcription factor PH4 in petunia flowers

© 2015 The Authors. New Phytologist © 2015 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 208(2015), 3 vom: 23. Nov., Seite 708-14
1. Verfasser: Cna'ani, Alon (VerfasserIn)
Weitere Verfasser: Spitzer-Rimon, Ben, Ravid, Jasmin, Farhi, Moran, Masci, Tania, Aravena-Calvo, Javiera, Ovadis, Marianna, Vainstein, Alexander
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't MYB emission floral scent pH petunia phenylpropanoid volatile Plant Proteins mehr... Transcription Factors Volatile Organic Compounds
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520 |a The mechanism underlying the emission of phenylpropanoid volatiles is poorly understood. Here, we reveal the involvement of PH4, a petunia MYB-R2R3 transcription factor previously studied for its role in vacuolar acidification, in floral volatile emission. We used the virus-induced gene silencing (VIGS) approach to knock down PH4 expression in petunia, measured volatile emission and internal pool sizes by GC-MS, and analyzed transcript abundances of scent-related phenylpropanoid genes in flowers. Silencing of PH4 resulted in a marked decrease in floral phenylpropanoid volatile emission, with a concurrent increase in internal pool levels. Expression of scent-related phenylpropanoid genes was not affected. To identify putative scent-related targets of PH4, we silenced PH5, a tonoplast-localized H(+) -ATPase that maintains vacuolar pH homeostasis. Suppression of PH5 did not yield the reduced-emission phenotype, suggesting that PH4 does not operate in the context of floral scent through regulation of vacuolar pH. We conclude that PH4 is a key floral regulator that integrates volatile production and emission processes and interconnects two essential floral traits - color and scent 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
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650 4 |a pH 
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650 4 |a phenylpropanoid 
650 4 |a volatile 
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650 7 |a Transcription Factors  |2 NLM 
650 7 |a Volatile Organic Compounds  |2 NLM 
700 1 |a Spitzer-Rimon, Ben  |e verfasserin  |4 aut 
700 1 |a Ravid, Jasmin  |e verfasserin  |4 aut 
700 1 |a Farhi, Moran  |e verfasserin  |4 aut 
700 1 |a Masci, Tania  |e verfasserin  |4 aut 
700 1 |a Aravena-Calvo, Javiera  |e verfasserin  |4 aut 
700 1 |a Ovadis, Marianna  |e verfasserin  |4 aut 
700 1 |a Vainstein, Alexander  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t The New phytologist  |d 1979  |g 208(2015), 3 vom: 23. Nov., Seite 708-14  |w (DE-627)NLM09818248X  |x 1469-8137  |7 nnas 
773 1 8 |g volume:208  |g year:2015  |g number:3  |g day:23  |g month:11  |g pages:708-14 
856 4 0 |u http://dx.doi.org/10.1111/nph.13534  |3 Volltext 
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